Sturgeon Catfish
Platystomatichthys sturio
A striking, ancient-looking predatory catfish native to the fast-flowing rivers of the Amazon basin. Known for its highly elongated, delicate snout and long maxillary barbels, it resembles a sturgeon. They are very active swimmers that require massive aquariums with massive footprints to prevent permanently damaging their snouts against the glass. They are highly predatory toward small fish but peaceful with large, deep-bodied tank mates.
Sturgeon Catfish At a Glance
Sturgeon Catfish Tank Requirements
Will Sturgeon Catfish fit in your tank?
Care guides tell you what Sturgeon Catfish needs, the next question is whether your tank can safely provide it. Test Sturgeon Catfish against your tank size, maintenance needs, and the fish you already keep before you buy.
Sturgeon Catfish Water Parameters
Sturgeon Catfish Temperament & Compatibility
Sturgeon Catfish Varieties
Each variety inherits the species defaults above. Only differences are highlighted.
Adult (Standard)
The fully mature Sturgeon Catfish. It must be housed in a very large custom tank (ideally 6 to 8 feet long and very wide) to allow it to turn without breaking its fragile rostrum (snout). Keep with large, robust tank mates that cannot fit into its surprisingly capacious mouth.
Differs in 1 trait from base species
Also known as: Full Grown, Adult Sturgeon Catfish
Juvenile (Grow-out)
Often sold around 10-15cm. While they can temporarily reside in a standard large aquarium, they grow rapidly and will quickly require a massive tank upgrade. They are highly predatory even at this size; do not keep with tetras or other small schooling fish.
Differs in 4 traits from base species
Also known as: Baby Zorro Catfish, Juvenile
Sturgeon Catfish Care Guide Summary
The Sturgeon Catfish, scientifically known as Platystomatichthys sturio, belongs to the Catfish family group. Adults reach a maximum size of approximately 40 cm and have a depressed body shape with a fast growth rate. Classified as semi-aggressive, this species primarily occupies the bottom zone of the aquarium and produces a extreme level of biological waste.
To thrive, the Sturgeon Catfish requires a freshwater only aquarium with a minimum volume of 800 litres and a tank length of at least 180 cm. Water temperature should be maintained between 22°C and 26°C, with a pH range of 6–7.5 and a general hardness of 2–15 dGH. A high water flow is preferred.
Due to its specialist needs, the Sturgeon Catfish is best suited for fishkeepers who can provide a carefully planned setup. This species is available in 2 varieties: Adult (Standard) and Juvenile (Grow-out). Each may differ slightly in size, temperament, or care needs, so it is worth checking the specific requirements of the variety you plan to keep.
Sturgeon Catfish Habitat Setup
When setting up an aquarium for the Sturgeon Catfish, a high water flow best suits their natural preferences. Because this species occupies the bottom zone, the aquarium layout should prioritise sufficient floor space with hiding spots among rocks, wood, or dense planting. Useful additions include a sand substrate to accommodate their sifting behaviour, smooth gravel or rounded substrate to protect their sensitive barbels, and driftwood, which can serve as both a hiding place and a dietary supplement.
Sturgeon Catfish Compatibility Notes
Classified as semi-aggressive, the Sturgeon Catfish is best housed alone, as they do not tolerate others of their kind in confined spaces. When choosing tankmates, any fish small enough to fit in its mouth will likely be eaten, conspecific aggression can be intense, especially in smaller tanks, and their energetic swimming style may stress more sedentary or timid species. Selecting tankmates that favour different water layers from the bottom zone can help reduce competition and territorial overlap.
Who Sturgeon Catfish Is Actually For
Sturgeon Catfish is best for a fishkeeper who wants a species that can settle into a calmer community setup and can provide someone who understands its individual space requirements. It makes the most sense for a hobbyist who will actually build around its needs, especially sand.
The most common mistake is treating Sturgeon Catfish like any other community fish and skipping the soft sand it needs to forage safely. Another frequent problem is forcing it into an over-busy community when it would do better with more room or more deliberate tankmate choices.
Sturgeon Catfish Feeding & Diet Considerations
The Sturgeon Catfish is a predatory species that will readily consume small fish, so nano or bite-sized tankmates should be avoided and is primarily active at dusk and dawn, so offering food shortly after lights-off ensures it receives adequate nutrition.
Frequently Asked Questions About Sturgeon Catfish
How big does Sturgeon Catfish get?
Sturgeon Catfish (Platystomatichthys sturio) typically reaches a maximum adult size of approximately 40 cm. They have a depressed body shape and a fast growth rate.
What tank size does Sturgeon Catfish need?
A minimum aquarium volume of 800 litres and a tank length of at least 180 cm are recommended for Sturgeon Catfish. This ensures enough swimming space and helps maintain stable water conditions.
What water parameters does Sturgeon Catfish need?
Sturgeon Catfish thrives in freshwater only conditions with a temperature range of 22–26°C, a pH between 6 and 7.5, and a general hardness of 2–15 dGH. A high water flow is preferred.
Is Sturgeon Catfish peaceful or aggressive?
Sturgeon Catfish is classified as semi-aggressive with an aggression score of 6 out of 10. They can work in community setups but may clash with certain tankmates.
Can Sturgeon Catfish live with others of its kind?
No. Only one Sturgeon Catfish should be kept per tank. Keeping multiples in the same aquarium typically results in aggression and stress.
Does Sturgeon Catfish have any special tank requirements?
Yes. Sturgeon Catfish benefits from sand (sifters), smooth gravel (sensitive barbels), and driftwood (digestion/hiding) in the aquarium. These features help replicate their natural habitat and promote overall health and well-being.
Useful setup supplies
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Guidarium Editorial Desk
Reviewed against Guidarium care, stocking, and compatibility standards. Read the editorial policy.
- Last reviewed
- May 11, 2026
- Last updated
- May 11, 2026
- Issues or corrections?
- Contact the editorial team
Plants That Suit Sturgeon Catfish
These plants pair well with Sturgeon Catfish based on shared water preferences, layout fit, and how likely they are to hold up in the same aquarium.
African Water Fern
Bolbitis heudelotii
Boivin's Aponogeton
Aponogeton boivinianus
Capuron's Aponogeton
Aponogeton capuronii
Madagascar Lace Plant
Aponogeton madagascariensis
African Onion Plant
Crinum calamistratum
Afzel's Anubias
Anubias afzelii
Fish Similar to Sturgeon Catfish
Red-Tail Catfish
Phractocephalus hemioliopterus
A massive, fast-growing predatory catfish from the Amazon basin. Famous for its voracious appetite, bulldozer-like behavior, and distinct red caudal fin. Due to its enormous adult size (often exceeding 4 feet), it is strictly a 'monster fish' that requires a heated indoor pond or a colossal custom aquarium. It is highly predatory and will swallow absolutely any tank mate that can fit into its cavernous mouth.
Lima Shovelnose Catfish
Sorubim lima
A highly distinctive, predatory catfish native to South America known for its elongated, flattened snout resembling a duckbill. They frequently rest vertically or head-down among driftwood to camouflage themselves. While generally peaceful toward fish too large to be eaten, they are highly effective nocturnal ambush predators and will swallow any tank mate that fits into their surprisingly large mouths.
Pungas Catfish
Pangasius pangasius
A colossal riverine catfish native to the Indian subcontinent. While highly important for aquaculture, they are disastrous for home aquariums. They grow rapidly to enormous sizes (up to 150-300cm), are easily spooked (often resulting in them ramming the tank glass at high speeds), and will swallow any tank mate that fits in their massive mouths.
Pacific Sturgeon
Acipenser transmontanus
The Pacific (or White) Sturgeon is the largest freshwater fish in North America. As a true 'monster fish', it requires an absolutely massive indoor facility or an outdoor pond. They are coldwater, anadromous fish that require high oxygen levels, fast flow, and a soft sandy substrate to protect their sensitive sensory barbels. They are strict bottom feeders and will inadvertently swallow small tank mates.
Shovelnose Sturgeon
Scaphirhynchus platorynchus
The Shovelnose Sturgeon is a prehistoric-looking, highly active cold-water fish native to the Mississippi and Missouri river basins. They are bottom-dwelling predators that sift through sand for invertebrates and small fish. They require massive aquariums or indoor ponds with heavy filtration, high oxygenation, and strong water flow to mimic their natural riverine habitats.
Pictus Catfish
Pimelodus pictus
An extremely active, striking silver catfish with black spots and incredibly long barbels, native to South America. While peaceful toward similarly sized tank mates, they are highly effective nocturnal predators that will easily swallow small fish (like Neon Tetras) whole. They are scaleless and possess sharp pectoral spines that can easily become entangled in aquarium nets.